Investment Loans & Fixed Terms: Avoid These Mistakes

Fixed rate terms on investment loans are not inherently safer than variable, and in Castle Hill, where portfolio growth often involves refinancing or equity release within three years, locking in a five-year term can cost you more than the rate discount saves.

The choice between a one-year, three-year or five-year fixed term is not about which rate looks lowest today. It is about how long you plan to hold the property without needing to refinance, sell, or draw on equity, and what happens if you guess wrong.

Why Fixed Rate Break Costs Exist and How They Add Up

When you fix a rate, the lender hedges that commitment in the wholesale funding market. If you exit the loan before the term ends, the lender charges the difference between what they locked in for you and what they can earn on the money now. In a falling rate environment, that break cost can exceed tens of thousands of dollars. A three-year fixed loan taken in mid-2023 at 5.89 per cent, with a remaining balance around the median investor loan amount, could trigger a break cost above $20,000 if discharged now. The figure depends on remaining term, loan size, and the difference between your fixed rate and the lender's current wholesale rate, but the shock is real and recurs across Castle Hill regularly.

Some lenders calculate break costs on a per-day basis. Others use a formula that compounds the rate differential over the remaining term. None of them waive the fee because you found a property you want to buy or because rates moved against you.

What Happens When You Want to Leverage Equity Mid-Term

Castle Hill investors often start with a single property and plan to use equity for a second purchase within two to three years. If your first loan is fixed for five years and you want to increase the limit or split the facility to release equity, you will either pay a break cost to refinance or accept a higher rate on the additional borrowing because the new lender cannot touch the fixed portion. In our experience, investors who lock in longer terms underestimate how quickly their equity position changes, particularly in suburbs where values have lifted and rental income supports further borrowing capacity.

Consider an investor who purchased a townhouse in the Castle Towers precinct in early 2024 with a fixed rate over five years. By mid-2026, the property has appreciated and rental demand remains solid. They identify a second property but cannot access the equity without breaking the fixed loan. The lender quotes a break cost that erodes most of the capital gain. The investor either delays the purchase, accepts a less competitive structure, or pays the fee and moves forward with a smaller deposit buffer than planned.

How the One-Year Fixed Term Fits an Active Investment Strategy

A one-year fixed rate gives you certainty over the next twelve months of repayments and lets you reassess without penalty once the term ends. It suits investors who expect to refinance, sell, or restructure within a short window, and it avoids the compounding rate differential that makes longer break costs so steep. The rate itself is often higher than a three-year equivalent, but if you exit in year two of a three-year term, the break cost will outweigh the margin you saved.

Investors building a portfolio in Castle Hill, particularly those targeting strata units near the Metro or freestanding homes in the Barclay Road catchment, often favour one-year terms because the liquidity and portfolio velocity matter more than locking in a rate that may not stay competitive. Rental income in the suburb supports interest-only structures, and most investors refinance within two years to consolidate debt or access equity for the next purchase.

Fixed Versus Variable for Interest-Only Investment Loans

Interest-only periods on investment loans run for one to five years, and the repayment type is separate from the rate type. You can fix the rate on an interest-only loan, but if your interest-only period ends before the fixed term does, your repayments jump to principal and interest while you are still locked into the fixed rate. That creates a servicing pinch that can limit your ability to borrow further or force you to refinance early and wear the break cost.

Variable rate loans let you switch between interest-only and principal and interest without penalty, extend the interest-only period if the lender agrees, or make lump sum reductions to the principal if your rental income exceeds expectations. Fixed loans do not. Most lenders cap extra repayments on fixed investment loans at $10,000 to $30,000 per year before charging a fee, and you cannot redraw those funds without breaking the loan.

The Three-Year Term and the 2027 Tax Changes

The negative gearing quarantine and capital gains tax changes take effect from 1 July 2027. Properties purchased before 7:30pm AEST on 12 May 2026 retain full negative gearing and the 50 per cent CGT discount. Properties purchased after that date, unless they qualify as new builds, cannot offset rental losses against salary or other income, and capital gains accruing after 1 July 2027 are taxed under the new indexation and minimum rate rules. If you fixed a three-year term in mid-2025, it expires around mid-2028, and you will be refinancing in an environment where lenders reassess your servicing without the benefit of full negative gearing offsets.

This does not mean a three-year term is wrong, but it does mean the refinance conversation in 2028 will be different from the one you had in 2025. Lenders will apply the 3 percentage point buffer to a loan that no longer improves your taxable income, and your borrowing capacity may contract even if the property has performed well. Investors in Castle Hill who locked in three or five-year terms before mid-2026 under the old tax settings should plan the refinance with that context front of mind.

What the DTI Cap Means for Fixed Rate Refinancing

From 1 February 2026, lenders can only write 20 per cent of new investor loans at a debt-to-income ratio of six times or higher. If your fixed term ends and your income has not kept pace with your debt, or if you have increased your investment loan balance using equity, you may find that the lender who approved your original loan will not refinance you at the same limit. That forces you into a different lender, often at a higher rate, or requires you to reduce the loan amount or inject cash to bring the DTI back under six.

Fixed terms defer the refinance decision but do not remove it. The longer the term, the more your financial position and the regulatory environment can shift before you get another chance to restructure. Castle Hill investors with multiple properties or higher loan-to-value ratios should factor the DTI cap into any fixed term longer than two years, particularly if rental income alone does not meet the serviceability buffer.

Splitting the Loan Between Fixed and Variable

Some lenders let you split a single investment loan into fixed and variable portions. You might fix 50 per cent of the balance over two years and leave the other 50 per cent variable. This gives you partial rate protection and keeps half the loan flexible for extra repayments, offset access where available, or penalty-free refinance. The downside is complexity: two rate types, two sets of terms, and two maturity dates to manage. If you want to refinance the whole loan mid-term, you still pay a break cost on the fixed portion.

Splits work when you are certain you will hold the property for at least the fixed term but want the option to adjust the variable portion without penalty. They do not work if you are likely to sell, equity-release, or consolidate loans before the fixed portion matures, because the break cost still applies and the partial hedge loses value.

Call one of our team or book an appointment at a time that works for you. We will map your fixed rate options against your actual plans for the portfolio, not just the rate sheet, and show you what each term costs if you need to move earlier than expected.

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